Tester for testing Christmas tree light bulbs and sockets



FIG. 1 is a front elevation of a tester for testing christmas tree light bulbs and sockets showing my new design;

FIG. 2 is a left side elevation thereof;

FIG. 3 is a rear elevation thereof;

FIG. 4 is a right side elevation thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a top plan view thereof. 

The ornamental design for a tester for testing Christmas tree light bulbs and sockets, as shown 